High efficiency multi-band envelope tracking power amplifier with tunable output frequency bands

Author

Chan-Sei Yoo ; Youjiang Liu ; Fairbanks, John ; Asbeck, Peter ; Theilmann, Paul ; Kimball, Donald

Author_Institution

Electron. Mater. & Device Res. Center, Korea Electron. Technol. Inst., Seongnam, South Korea

fYear

2015

fDate

13-15 April 2015

Firstpage

1

Lastpage

4

Abstract

A multi-band power amplifier (PA) with electrically tunable output matching network is reported, whose output power and efficiency can be optimized over multiple frequencies (750MHz, 880MHz and 940MHz). It is incorporated within an envelope tracking (ET) amplifier using a high efficiency dynamic envelope voltage supply. High efficiency (50%) for all the three bands has been demonstrated with good output linearity, using a memory digital predistortion (DPD) method.

Keywords

UHF power amplifiers; PA; electrically tunable output matching network; envelope tracking amplifier; frequency 750 MHz; frequency 880 MHz; frequency 940 MHz; memory digital predistortion; multi-band power amplifier; Digital signal processing; Frequency conversion; Irrigation; Memory management; Microstrip; Radio frequency; Switches; digital predistortion; envelope tracking; power amplifiers; tunable matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual

Conference_Location

Cocoa Beach, FL

Type

conf

DOI

10.1109/WAMICON.2015.7120372

Filename

7120372